On graphs with maximum Harary spectral radius

Fei Huang, Xueliang Li, Shujing Wang

Let $G$ be a simple graph with vertex set $V(G)=\{v_1,v_2,\cdots ,v_n\}$. The Harary matrix $RD(G)$ of $G$, which is initially called the reciprocal distance matrix, is an $n \…